Improvement in locomotives



PHILLIP H. CORLEIT, OF WEST MANCHESTER, PENNSYLVANIA.

IMPROVEMENT IN LOCOMOTIVES.

Specification forming part of Letters Patent No. 40,554, dated November 10,1865.

To all wwm t may concern:

Be it known that I, PHILLIP H. GORLETT, of West Manchester, in the county of Allegheny and State of Pennsylvania, have invented new and useful Improvements in Locomotives; and I do hereby declare that the following is a full and complete description of the construction and operation ot' the same, reference being had to the accompanying drawings, making part of this specification, in Which- Figure lis a front view, with part of the front plate removed, showing the interior. Fig. 2 is a vertical section, and Fig. S'shows the front plate and door.

rIhe nature of my invention relates to the construction of the fire-box. It is so formed, with double plates, that an air chamber or space filled with a poor conductor of heat is interposed between t-he inner and outer plates, for the purpose of protecting the outer plates from the action of the heat caused by the iiame or heat entering the smoke-box through the dues or by the combustion of the cinders in the smoke-box.

It is a well-established fact, based upon the experience of every locomotiveengineer, that when the plates ofthe smoke-box, to which the steam chests and cylinders are attached, become heated, even to a low red, the plates are liable to warp, and thus derange the working of the valves and piston.

It is the object of my improvement to obviat'e this difficulty. In order to accomplish this ohject,eI construct the smokebox with double plates, the external ones being of the usual form and thickness.

In the accompanying drawings, A represents the outer plates. Uponthe inside of this I secure the lining B B', which may be made of light plate-iron, extending up the sides nearly to the top of the smoke-box, leaving a space ot' from two to six inches between the plates. For the lower third of the smoke-box the plates may be .placed at an angle of about forty-tive degrees, for the purpose of conveniently discharging the cinders, as shown at B. and inner plates may be tilled with fire-bricks or other poor conductor, though this is.not deemed important. The inner set ot' plates are made as nearly airtight as practicable. The front outer plate of the smoke-box is provided with a number of holes, C, for the purpose of admitting a circulation of cool air between the outer and inner plates. The door D, which opens into the interior of the smokebox, is, like the other parts, constructed with two plates, the outer 011e beingprovided with air-holes C for the purpose of the circulation ot' air between the door-plates. This door shuts as closely as possible, to prevent vthe air from entering the smoke-box. For the purpose, however, of causing a more complete combustion of the gases within the smokebox, I introduce a small pipe, E, of an inch or less in diameter, through the door D,`which can be closed at pleasure by means of a plug.

What I claim as my improvement, and desire to secure by Letters Patent, is-

Making the body of the smoke-box ot' locomotives with double plates A B B', with an air-space between them, with perforations C C', for thepurpose of protecting the outer plate from the destructive action of the heat, substantiall'y as speciiied.

. PHILLIP H. CORLETT.

Witnesses:

J. 'BRAINERD, WM. K. CoRLETT.

The space between the outer 

